Updates UI theme metrics for traffic-light controls and chrome inset to slightly larger values. In the desktop window chrome surface, positioning now uses the title bar center directly, rounds rendered margins, and introduces short easing animations for X/Y chrome offsets to reduce jitter during movement.
Adds focused title-bar geometry to the window service and updates the Sway backend to derive frame data more reliably (including parent node fallback and content rect tracking for wrapped/floating views). Window chrome positioning now centers against the actual title bar instead of deco offsets, improving alignment. Also refreshes visual sizing/padding for traffic-light controls and Sway titlebar spacing to match the new chrome metrics.
Introduces a dedicated layer-shell `WindowChromeSurface` that renders macOS-style traffic-light controls over the focused Sway window titlebar, replacing the old top-bar window controls. Adds theme tokens and a reusable `TrafficLightButton` component, updates shell QML/CMake wiring, and adjusts Sway titlebar padding/title format so window titles do not overlap the overlay. Window tracking was extended with focused-window geometry/deco/fullscreen properties plus backend refresh support so the chrome follows window movement and state changes in near real time.
andrew